Mathematics
Senior High
（1、2）解き方教えてください！
5 次の式を計算せよ。
(1) (1+√√31)
2 (cos + + 1 sin 4)
68
180
to
E
22 (cos/rssinrs)
8 ( COSR + i sin Te)
(2) (1+i)(√3-i)-³
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